<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../VueJs/vue.js"></script>
</head>

<body>
    <div id="root">
        姓：<input type="text" v-model="firstName"><br>
        名：<input type="text" v-model="lastName"><br>
        姓名：<span>{{fullName()}}</span><!-- data中的任何一个数据发生改变，模板都会重新解析！
                                             若遇到插值语法里面写方法，则方法一定会重新调用 -->
    </div>
</body>
<script>
    Vue.config.productionTip = false;
    Vue.config.devtools = true;

    const vm = new Vue({
        el: '#root',
        data: {
            firstName: "张",
            lastName: '三'
        }, methods: {
            fullName() {
                return `${this.firstName}-${this.lastName}`;
            }
        }
    });
</script>

</html>